linux-kernel - Re:Re: [PATCH 1/2] f2fs: add sysfs nodes to get discard information

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Message-ID: <ACIArwDxD7lffBbq-DPSbarm.3.1629081754403.Hmail.frank.li@vivo.com>
Date:   Mon, 16 Aug 2021 10:42:34 +0800 (GMT+08:00)
From:   李扬韬 <frank.li@...o.com>
To:     Chao Yu <chao@...nel.org>
Cc:     jaegeuk@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re:Re: [PATCH 1/2] f2fs: add sysfs nodes to get discard information

>> I've added new sysfs nodes to show discard stat since mount, which
>> will help us analyze whether the performance problem is related to
>> discard.
>> 
>> issued_discard  - Shows the number of issued discard
>> queued_discard  - Shows the number of cached discard cmd count
>> discard_cmd_cnt - Shows the number of cached discard cmd count
>> undiscard_blks  - Shows the number of undiscard blocks
>
>We have exported them in debugfs, can you use that?
>
>Thanks,

But now Android is forbidden to open debugfs, and in fact we have not
opened this configuration for a long time.

Thx,
Yangtao